# include <FastLED.h>

#define NUM_LEDS 18
#define LED_PIN 2

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(100);
}

void loop() {

  leds[0] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[1] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[2] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[3] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[4] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[5] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[6] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[7] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[8] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[9] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[10] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[11] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[12] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[13] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[14] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[15] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[16] = CRGB::Red;
  FastLED.show();
  delay(600);

  leds[17] = CRGB::Red;
  FastLED.show();
  delay(600);

  fill_solid(leds, NUM_LEDS, CRGB::Black);
  FastLED.show();
  delay(500);

  fill_solid(leds, NUM_LEDS, CRGB::Red);
  FastLED.show();
  delay(500);

  fill_solid(leds, NUM_LEDS, CRGB::Black);
  FastLED.show();
  delay(500);

  fill_solid(leds, NUM_LEDS, CRGB::Red);
  FastLED.show();
  delay(500);

  fill_solid(leds, NUM_LEDS, CRGB::Black);
  FastLED.show();
  delay(500);

}